Mr. VV. H. Benson un su me fun us 0/ Stenothyra. 497 



This shell was I'ound by Dr. Cantor in company with St. 

 ylahrata, A. Adams, but more rarely. Its narrower elongated 

 form distinguishes it from all previously described species. 

 The sculpture has some resemblance to that of St. polita, Sow,, 

 and to that of the species next to be described. 



2. Stenothyra monilifera, nobis, u. s. 



Testa subpcrforato-rimata, oblongo-ovata, compressiuscula, nitidi- 

 uscula, siilcis coufeitioribus, dense puncticulatis, spiralibus im- 

 pressa, fusco-coniea, fascia pallida supra mediam ornata, versus 

 apicem obtusulum hyaliuum rubente, spira convexo-couica, sutura 

 profunda, eanaliculata ; anfraotibus '1| couvexis, ultimo subsoluto, 

 y testre requaute, antice valde desceudente, subtus rotundato, pe- 

 riompbalo subcom])resso ; apertura obliqua diagonal], rotundato- 

 ovali, sulco profundiori ab anfractu penultimo divisa, peristoraate 

 obtusulo, cailo parictali supenie solum couspicuo. Operculo cor- 

 neo-pellucido, apico ad dextram spectante. 



Long. -4^, diam. 3 mill. 



Hab. ad Mergui Burmauorum. Teste W. Theobald. 



Distinguished fi'om the last by its form, more developed 

 sculpture, colour, want of polish, and peculiar umbilical rimation. 



3. Stenothyra foveolata, nobis, u. s. 



Testa vix rimata, ovato-acuta, spiraliter foveolato-striata, striis versus 

 basin confertissimis, spira conica, apice acuto, sutura mediocri ; 

 aufractibus o couvexiusculis, ultimo ad veutrem planiusculo, ^ 

 testae sequante, antice desceudente, basi rotundato ; apertura ob- 

 liqua, rotmidato-ovata, peristomate obtuso, margine parietali sulco 

 mediocri ab anfractu ventrali separato. Operculo ? 



Long. .0, dlani. 3} mill. 



Hab. in Gange fluvio, prope Sikrigali. Teste Capt. T. Hutton. 



This shell has reached me in a weathered condition, so that 

 the colour and the normal condition of the surface cannot be 

 exactly described. Its form, however, and the pitted lines seem 

 to mark it as a distinct species. In form it resembles the small 

 St. puncticulata, A. Adams, from the Eastern Isles ; but in that 

 species the puncticulate lines are faint and distant, and not 

 closely set even towards the base, while a scarcely compressed 

 ridge runs down by the side of the slightly impressed rimation 

 and joins the columellar margin below it, a feature not found in 

 the Gangetic shell. Another Stenuthtjra resembling foveolata 

 in the characters of the aperture, and marked with delicately 

 puncticulate lines, was found with it, but, from the imperfection 

 of the spire, its identity with it cannot be safely declared. The 

 degree of closeness between the lines is about the same, and the 

 surface is of a pale horn-colour, as in some specimens of St. Delta-, 



Ann. cV May. X. Hist. Ser. 2. rol. xvii. 32 



